<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2224-5421</journal-id>
<journal-title><![CDATA[Revista Cubana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cub Quim]]></abbrev-journal-title>
<issn>2224-5421</issn>
<publisher>
<publisher-name><![CDATA[Ediciones UO, Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-54212020000300494</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio comprensivo sobre la remoción de iones cromatos a diferente basicidad con zeolita tipo mordenita natural]]></article-title>
<article-title xml:lang="en"><![CDATA[Comprehensive study on chromate ions removal at different basicity whit zeolite of natural mordenite type]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Córdova-Rodríguez]]></surname>
<given-names><![CDATA[Valduvina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Iznaga]]></surname>
<given-names><![CDATA[Inocente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garcell-Puyàns]]></surname>
<given-names><![CDATA[Leonel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Petranovskii]]></surname>
<given-names><![CDATA[Vitalii]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Heredia]]></surname>
<given-names><![CDATA[Dunia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oriente Centro Nacional de Electromagnetismo Aplicado ]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de La Habana Instituto de Ciencia y Tecnología de Materiales (IMRE) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Oriente Facultad de Ingeniería Química y Agronomía ]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Nanociencias y Nanotecnología (CNyN) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>32</volume>
<numero>3</numero>
<fpage>494</fpage>
<lpage>510</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212020000300494&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212020000300494&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212020000300494&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se presenta un estudio comprensivo sobre la remoción de iones cromato (CrO4 2-) de disoluciones acuosas, para diferentes niveles de alcalinidad, con la zeolita natural tipo Mordenita del yacimiento de Palmarito de Cauto. Se determinó la densidad de carga superficial y el punto de carga cero (p.z.c.) para esta zeolita, cuyo valor indica que este ion se adsorbe en este mineral mediante un mecanismo de adsorción específica, asociado con la formación de una doble capa eléctrica. Mediante la espectroscopia de emisión atómica, espectroscopia infrarroja (FT-IR) y Microscopía electrónica de barrido (MEB) con EDX se demostró que esta zeolita remueve cromo de estas disoluciones, lo cual ocurre independientemente de su nivel de basicidad. El mineral posee un efecto neutralizante significativo sobre las disoluciones alcalinas. Los resultados proporcionan información que amplía las potencialidades de utilidad de un recurso natural abundante, de bajo costo y gran accesibilidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This work presents a comprehensive study on chromate ions (CrO4 2-) removal from aqueous solutions for different levels of alkalinity in the natural mordenite zeolite from Palmarito de Cauto deposit. The Surface charge density and zero charge point (p.z.c.) values of the zeolite were determined, which lead to outline that these ions are adsorbed on this mineral in a specifically form and it was associated with the formation of an electric layer double. Through atomic emission spectroscopy, infrared spectroscopy (FT-IR) and scanning electron microscopy (MEB) with EDX was showed that this zeolite removes chromium from the aqueous solutions of chromate ions and it occurs independently of its basicity level. The mineral has a significant neutralizing effect on alkaline solutions. The results provide information that expands the useful potential of an abundant natural resource, with low cost and great accessibility.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[zeolita natural]]></kwd>
<kwd lng="es"><![CDATA[mordenita]]></kwd>
<kwd lng="es"><![CDATA[cromato]]></kwd>
<kwd lng="es"><![CDATA[neutralización]]></kwd>
<kwd lng="es"><![CDATA[adsorción específica]]></kwd>
<kwd lng="en"><![CDATA[natural zeolite]]></kwd>
<kwd lng="en"><![CDATA[mordenite]]></kwd>
<kwd lng="en"><![CDATA[chromate]]></kwd>
<kwd lng="en"><![CDATA[neutralization]]></kwd>
<kwd lng="en"><![CDATA[specific adsorption]]></kwd>
</kwd-group>
</article-meta>
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